I need to convert this to kotlin: ``` @Configurat...

# spring

[poohbar]

I need to convert this to kotlin:

@Configuration
@ConfigurationProperties(prefix = "demo.security.jwt")
public class JwtSettings {
    /**
     * {@link JwtToken} will expire after this time.
     */
    private Integer tokenExpirationTime;

    /**
     * Token issuer.
     */
    private String tokenIssuer;
    
    /**
     * Key is used to sign {@link JwtToken}.
     */
    private String tokenSigningKey;

    ....